powerpc/86xx: Add SERDES support on MPC8641 & MPC8610

Add the ability to determine if a given IP block connected on SERDES is
configured.  This is useful for things like PCIe and SRIO since they are
only ever connected on SERDES.  This mimics the code we have in place
for the 85xx platforms.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/cpu/mpc86xx/Makefile

@@ -42,6 +42,8 @@ COBJS-$(CONFIG_MPC8641) += ddr-8641.o
 COBJS-$(CONFIG_OF_LIBFDT) += fdt.o
 COBJS-y	+= interrupts.o
 COBJS-$(CONFIG_MP) += mp.o
+COBJS-$(CONFIG_MPC8610) += mpc8610_serdes.o
+COBJS-$(CONFIG_MPC8641) += mpc8641_serdes.o
 COBJS-y	+= speed.o
 
 SRCS	:= $(START:.o=.S) $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)

arch/powerpc/cpu/mpc86xx/cpu_init.c

@@ -1,5 +1,5 @@
 /*
- * Copyright 2004,2009 Freescale Semiconductor, Inc.
+ * Copyright 2004,2009-2010 Freescale Semiconductor, Inc.
  * Jeff Brown
  * Srikanth Srinivasan (srikanth.srinivasan@freescale.com)
  *
@@ -31,6 +31,7 @@
 #include <mpc86xx.h>
 #include <asm/mmu.h>
 #include <asm/fsl_law.h>
+#include <asm/fsl_serdes.h>
 #include <asm/mp.h>
 
 void setup_bats(void);
@@ -76,6 +77,9 @@ void cpu_init_f(void)
  */
 int cpu_init_r(void)
 {
+	/* needs to be in ram since code uses global static vars */
+	fsl_serdes_init();
+
 #if defined(CONFIG_MP)
 	setup_mp();
 #endif

arch/powerpc/cpu/mpc86xx/mpc8610_serdes.c

@@ -0,0 +1,85 @@
+/*
+ * Copyright 2010 Freescale Semiconductor, Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <config.h>
+#include <common.h>
+#include <asm/io.h>
+#include <asm/immap_86xx.h>
+#include <asm/fsl_serdes.h>
+
+#define SRDS1_MAX_LANES		4
+#define SRDS2_MAX_LANES		4
+
+static u32 serdes1_prtcl_map, serdes2_prtcl_map;
+
+static u8 serdes1_cfg_tbl[][SRDS1_MAX_LANES] = {
+	[0x1] = {PCIE1, PCIE1, PCIE1, PCIE1},
+	[0x4] = {PCIE1, PCIE1, PCIE1, PCIE1},
+	[0x7] = {NONE, NONE, NONE, NONE},
+};
+
+static u8 serdes2_cfg_tbl[][SRDS2_MAX_LANES] = {
+	[0x0] = {PCIE2, PCIE2, PCIE2, PCIE2},
+	[0x4] = {PCIE2, PCIE2, PCIE2, PCIE2},
+	[0x7] = {NONE, NONE, NONE, NONE},
+};
+
+int is_serdes_configured(enum srds_prtcl device)
+{
+	int ret = (1 << device) & serdes1_prtcl_map;
+
+	if (ret)
+		return ret;
+
+	return (1 << device) & serdes2_prtcl_map;
+}
+
+void fsl_serdes_init(void)
+{
+	immap_t *immap = (immap_t *) CONFIG_SYS_CCSRBAR;
+	ccsr_gur_t *gur = &immap->im_gur;
+	u32 pordevsr = in_be32(&gur->pordevsr);
+	u32 srds_cfg = (pordevsr & MPC8610_PORDEVSR_IO_SEL) >>
+				MPC8610_PORDEVSR_IO_SEL_SHIFT;
+	int lane;
+
+	debug("PORDEVSR[IO_SEL_SRDS] = %x\n", srds_cfg);
+
+	if (srds_cfg > ARRAY_SIZE(serdes1_cfg_tbl)) {
+		printf("Invalid PORDEVSR[IO_SEL_SRDS] = %d\n", srds_cfg);
+		return;
+	}
+	for (lane = 0; lane < SRDS1_MAX_LANES; lane++) {
+		enum srds_prtcl lane_prtcl = serdes1_cfg_tbl[srds_cfg][lane];
+		serdes1_prtcl_map |= (1 << lane_prtcl);
+	}
+
+	if (srds_cfg > ARRAY_SIZE(serdes2_cfg_tbl)) {
+		printf("Invalid PORDEVSR[IO_SEL_SRDS] = %d\n", srds_cfg);
+		return;
+	}
+
+	for (lane = 0; lane < SRDS2_MAX_LANES; lane++) {
+		enum srds_prtcl lane_prtcl = serdes2_cfg_tbl[srds_cfg][lane];
+		serdes2_prtcl_map |= (1 << lane_prtcl);
+	}
+}

arch/powerpc/cpu/mpc86xx/mpc8641_serdes.c

@@ -0,0 +1,94 @@
+/*
+ * Copyright 2010 Freescale Semiconductor, Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <config.h>
+#include <common.h>
+#include <asm/io.h>
+#include <asm/immap_86xx.h>
+#include <asm/fsl_serdes.h>
+
+#define SRDS1_MAX_LANES		4
+#define SRDS2_MAX_LANES		4
+
+static u32 serdes1_prtcl_map, serdes2_prtcl_map;
+
+static u8 serdes1_cfg_tbl[][SRDS1_MAX_LANES] = {
+	[0x2] = {PCIE1, PCIE1, PCIE1, PCIE1},
+	[0x3] = {PCIE1, PCIE1, PCIE1, PCIE1},
+	[0x5] = {PCIE1, PCIE1, PCIE1, PCIE1},
+	[0x6] = {PCIE1, PCIE1, PCIE1, PCIE1},
+	[0x7] = {PCIE1, PCIE1, PCIE1, PCIE1},
+	[0xf] = {PCIE1, PCIE1, PCIE1, PCIE1},
+};
+
+static u8 serdes2_cfg_tbl[][SRDS2_MAX_LANES] = {
+	[0x3] = {PCIE2, PCIE2, PCIE2, PCIE2},
+	[0x5] = {SRIO1, SRIO1, SRIO1, SRIO1},
+	[0x6] = {SRIO1, SRIO1, SRIO1, SRIO1},
+	[0x7] = {SRIO1, SRIO1, SRIO1, SRIO1},
+	[0x9] = {SRIO1, SRIO1, SRIO1, SRIO1},
+	[0xa] = {SRIO1, SRIO1, SRIO1, SRIO1},
+	[0xb] = {SRIO1, SRIO1, SRIO1, SRIO1},
+	[0xe] = {PCIE2, PCIE2, PCIE2, PCIE2},
+	[0xf] = {PCIE2, PCIE2, PCIE2, PCIE2},
+};
+
+int is_serdes_configured(enum srds_prtcl device)
+{
+	int ret = (1 << device) & serdes1_prtcl_map;
+
+	if (ret)
+		return ret;
+
+	return (1 << device) & serdes2_prtcl_map;
+}
+
+void fsl_serdes_init(void)
+{
+	immap_t *immap = (immap_t *) CONFIG_SYS_CCSRBAR;
+	ccsr_gur_t *gur = &immap->im_gur;
+	u32 pordevsr = in_be32(&gur->pordevsr);
+	u32 srds_cfg = (pordevsr & MPC8641_PORDEVSR_IO_SEL) >>
+				MPC8641_PORDEVSR_IO_SEL_SHIFT;
+	int lane;
+
+	debug("PORDEVSR[IO_SEL_SRDS] = %x\n", srds_cfg);
+
+	if (srds_cfg > ARRAY_SIZE(serdes1_cfg_tbl)) {
+		printf("Invalid PORDEVSR[IO_SEL_SRDS] = %d\n", srds_cfg);
+		return;
+	}
+	for (lane = 0; lane < SRDS1_MAX_LANES; lane++) {
+		enum srds_prtcl lane_prtcl = serdes1_cfg_tbl[srds_cfg][lane];
+		serdes1_prtcl_map |= (1 << lane_prtcl);
+	}
+
+	if (srds_cfg > ARRAY_SIZE(serdes2_cfg_tbl)) {
+		printf("Invalid PORDEVSR[IO_SEL_SRDS] = %d\n", srds_cfg);
+		return;
+	}
+
+	for (lane = 0; lane < SRDS2_MAX_LANES; lane++) {
+		enum srds_prtcl lane_prtcl = serdes2_cfg_tbl[srds_cfg][lane];
+		serdes2_prtcl_map |= (1 << lane_prtcl);
+	}
+}